Rewritten 808x CPU emulation core based on reenigne's XTCE, VisiOn, SnatchIt, and 8088 MPH now work correctly;

Fixed PC speaker sound volume in PIT mode 0;
A few CPU emulation clean-ups;
Hard disk controller changing redone in a less messy way;
Re-added the long-missing key send delay handling to the XT keyboard handler;
Fixed a bug that was causing SLiRP not to work when compiled with MingW/GCC 7.3.0-2 or newer;
Some serial mouse and port fixes;
A lot of changes to printer emulation, mostly based on DOSBox-X;
Printer PNG writer now uses statically linked libpng;
Added support for the HxC MFM floppy image format and upped 86F format version to 2.12;
Ported various things from PCem and some from VARCem;
Added the S3 86c801/805 emulation (patch from TheCollector1995);
Fixed and renamed the EGA monitor options;
Better synchronized the 808x to the PIT and the CGA;
Fixed the CGA wait state calculation;
Cleaned up some things in mem.c;
Fixed some things in the floppy emulation to make VisiOn get the correct errors from the copy protection disk;
Fixed several renderer-related bugs, including the SDL2 renderer's failure to take screenshots;
The Jenkins builds are now compiled with MingW/GCC 7.4.0-1 and include all the required DLL's.

src/win/win_stbar.c

@@ -485,6 +485,7 @@ ui_sb_update_panes(void)
     int c_mfm, c_esdi, c_xta;
     int c_ide, c_scsi;
     int do_net;
+    char *hdc_name;
 
     if (sb_ready) {
 	sb_ready = 0;
@@ -526,6 +527,7 @@ ui_sb_update_panes(void)
 	if (fdd_get_type(i) != 0)
 		sb_parts++;
     }
+    hdc_name = hdc_get_internal_name(hdc_current);
     for (i=0; i<CDROM_NUM; i++) {
 	/* Could be Internal or External IDE.. */
 	if ((cdrom[i].bus_type == CDROM_BUS_ATAPI) &&